Liquid-tempering device



A. 1'. DAVIS.

LIQUID TEMPERING DEVICE.

APPLICATION FILED JAN. 31. I916.

Patented Mar. 2, 1920.

UNITED STATES PATENT OFFICE.

ALFRED J. DAVIS, OF MINNEAPOLIS, MINNESOTA.

LIQUID-TEMPERING DEVICE.

Application filed January 31, 1916.

To all whom it may concern:

Be it known that I, Annual) J. DAVIS, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Liquid- Tempering Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it 1 appertains to make and use the same.

My invention has for its object to provide an extremely simple and highly etlicient liquid tempering device especially adapted for use in tempering milk and cream, either by way of raising or lowering the temperature thereof; and to such ends, generally stated, the invention consists of the novel construction and combination of parts hereinafter described and defined in the claims.

The invention is illustrated in the accom panying drawings, wherein like characters indicate like parts throughout the several views. Referring to the drawings:

' Figure 1 is a side elevation showing the improved apparatus;

Fig. 2 is a plan view of the same;

Fig. 3 is a vertical section taken through the apparatus on the line 03 m of Figs. 2 and 4; and

Fig. 4 is a horizontal section taken on the line 00 03* of Fig. 3.

The apparatus is preferably made in cylindrical form, the two main elements thereof being an outer cylindrical tank 1 and an inner cylindrical tank 2. The outer tank 1 is provided with a surrounding shell 3 that cooperates therewith to form an annular jacket or chamber 4: adapted to contain the tempering medium. Both of the cylindrical shells 1 and 2 are closed at their bottoms, but the bottom of the latter is considerably above the bottom of the former. The two shells 1 and 2 are concentrically located but slightly spaced apart, so as to form a very thin or attenuated annular tempering chamber 5 between them. The upper end of the shell 1 extends considerably above its j acket ing shell 3, and the inner shell 2, at its eX- treme upper edge, has an out-turned flange 6 that rests directly on the beaded upper edge of the said shell 1. Just below its flanged edge 6, the inner shell 2 has a slightly out-pressed annular bulge 7 that Specification of Letters Patent.

Patented Mar. 2, 1920.

Serial No. 75.277.

engages the upper end portion of the shell 1 and holds the two shells 1 and 2 concentrically paced.

An intake pipe 8 extends down through the inner shell 2, preferably close to one side thereof, and opens through the bottom thereoi into the space between the bottoms of the two shells l and 2. The numeral 9 indicates a solder joint or similar connection between the upper portions of the intake pipe 8 and inner shell 2. The outer shell 1, at a point above the upper edge of its jacket 3 has a radial or outwardly pro jected discharge spout 10 through which the liquid may flow from the upper portion of the annular tempering chamber 5. The jacket 3 has an overflow spout 11 which, however, is located considerably below the overflow spout 10. Leading from the lower portion of the tempering chamber 5, through the outer shell 1 and its jacket 3, is a drain spout 12 normally closed by a plug 13, or other suitable device.

hen the apparatus is to be used for the cooling of a liquid, such as milk or cream, for example, ice may be packed within the inner shell 2 and in the chamber 4. between the outer shell 1 and its jacket 3, or a cooled water may be continuously run into the inner shell 2 and allowed to overflow into the annular jacketing chamber 4.

Here it is important to note that the flange 6 on the upper end of the inner shell 2 will direct the water that overflows from said inner shell 2 into the said jacket chamher a and will eii'ectually prevent any of this overflowing water from getting into the annular tempering chamber Thus, water may be supplied to the interior of the shell 2 and to the jacketing chamber 4 by a continuous stream delivered into the former and the water will be passed off through the overflow spout 11 of the latter.

The milk or cream, or other liquid to be ,cooled willbe continuously fed to the boting action of the tempering water on both sides, so it will thus not only be rapidly, but very thoroughly and evenly cooled.

When the deviceis to be used to heat milk, cream, or other liquid, the process of the operation is the same, except that relatively hot water would be circulated through the chamber of the inner shell 2 and the jacket 4 of the outer shell 1.

The device described is also very easily cleaned and sterilized because the inner shell 2 can be easily picked out of the outer shell, thereby exposin all of the surfaces of the tempering chain er. Also, the device is of small cost, as well as highly eflicient forthe purposes had in view. It may, therefore, be made and sOld at a price within easy reach of small farmers or persons who have but a few cows. Also, as already indicated, the apparatus is capable of more general use as a liquid tempering device.

What I claim is:

1. A tempering apparatus comprising outer and inner shells having a surrounding water jacket, the latter having an overflow passage, said outer and inner shells being spaced to afford an attenuated tempering chamber, the latter having a lateral discharge spout, both of said shells and the water a'cket being relatively fixed and said inner shell having at its upper edge a continuous out-turned flange that overlaps the upper edge of the outer shell to afford an unbroken overflow between the chamber of the inner shell and the water jacket, and a tube leading to the attenuated chamber for the delivery of milk thereto.

2. In a tempering apparatus, the combination with an outer shell having a surrounding jacket for the tempering medium, the latter having an overflow passage, and the said outer shell having a discharge spout located above said overflow passage, of an inner shell slightly spaced from said outer shell to form an attenuated tempering chamber and having an out-turned flange at its upper edge overlapping the upper edge of said outer shell and serving to direct overflowing tempering liquid from the interior of said inner shell into the surrounding tempering chamber of said outer shell, the top of said jacket being below the tops of said two shells, and a supply pipe extended downward through said inner shell and delivering to the lower extremity of said attenuated tempering chamber.

In testimony whereof I afiix my signature in presence of two witnesses.

' ALFRED J. DAVIS. WVitnesses:

HARRY D. KILGORE, F. D. MERCHANT. 

